Low-temperature impact issues in pressure vessel forgings
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Dear seniors, I made a mistake recently. The forgings I have should have been subjected to a low-temperature impact test at -20°C, but I was careless when placing the order and forgot to include that requirement. As a result, the forging factory supplied impact forgings at 0°C. I haven’t been able to eat for several days now, and this situation hasn’t improved yet. I’m looking for any possible remedies; please, kinder seniors, give me some advice. . .
As a supplementary note, the material is 16MnIII. . . .
It can be done again; the manufacturing factory is also capable of doing it
This post was last edited by zjq1962 on 2019-10-28 08:08. Does the forging factory have materials from the same furnace? Perform impact testing again.
If there is excess material from the same batch, it can be processed further in accordance with forging standards – as long as the impact test at -20 degrees Celsius yields satisfactory results.
Just redo it; the low-temperature impact energy of 16Mn forgings at -20°C is generally not a problem.
The simplest way is to find the manufacturer and have a new quality certificate issued. The manufacturer should have materials from the same furnace, conduct additional impact tests, and issue a new quality certificate. If none are available, you can use a small piece from the raw materials you purchased to make a sample and conduct the impact test again. Then, repurchase. Personally, I think the first one can be achieved.
Eat when it’s time to eat, and drink when it’s time to drink. There’s no need to get angry! There are two methods: one is to carry out the work again, and the other is to check whether the design documents specify any requirements for impact tests; if not, then it doesn’t matter.
There’s no need to get anxious; talk to the manufacturer about conducting additional low-temperature impact tests – it should be possible to meet the requirements. The problem is that there are issues with the quality system control in your company, right? Why didn’t anyone review the commission order?
I am the designer. . . Also include the craftsmanship, and then add a sentence to address what was omitted in the supplementary details
I have already called the manufacturer to issue a new quality certificate; thank you